[erledigt]Listview Flat darstellen

[Jens Schumann]

Hallo,
so könnte es klappen

Delphi-Quellcode:

procedure TForm1.Button1Click(Sender: TObject);
const
  HDS_BUTTONS = $2;
  LVM_FIRST = $1000;
  LVM_GETHEADER = LVM_FIRST + 31;
var
  hHeader: THandle;
  style: dWord;
begin
  {to get the header handle for the listview}
  hHeader := SendMessage(ListView1.Handle, LVM_GETHEADER, 0, 0);

  {to get the current style attributes for the header}
  style := GetWindowLong(hHeader, GWL_STYLE);

  {to toggle the HDS_BUTTONS style}
  style := style xor HDS_BUTTONS;

  {to apply the new style}
  SetWindowLong(hHeader, GWL_STYLE, style);

  {to invalidate the listview}
  SetWindowPos(ListView1.Handle, Form1.Handle, 0, 0, 0, 0,
               SWP_NOZORDER or SWP_NOSIZE or SWP_NOMOVE or SWP_DRAWFRAME)
end;